You will need a utility like 7-Zip (the native software for .7z files) or WinRAR .

Depending on where you found this file, it likely contains one of the following types of content: 1. Digital Textures for 3D Modeling

If you are using software like Blender, Marvelous Designer, or SketchUp, this archive likely holds .

Used to upload to sites like Redbubble or Society6 to create physical shower curtains.